Bunsen burner.



Patented Nov.,..,l3, |900.

L. L. RWE.

BUNSEN BURNER. (Application led Hay 28,1898.)

2 Sheets-Sheet l.

(No Model.)

WITNESSEE L cfa/4M No. 661,646. {Pfafefed Nov. |3,- |960.

L Rows BUNSEN BURNER.

(Application i-led May 2B, 1898.)

2 Sheets-Sheet 2l (No Model.)

s E 5 5 E N w w m: Nanms PETERS q. Mmmm `ed for heating purposes. A

UNITED STATES 'PATENT OFFICE.

LEVI LEROY ROWE, OF BOSTON, MASSACHUSETTS.

BUNSEN BURNER.

SPECIFICATION forming part of Letters Patent No. 661,646, dated November 13, 1900.

Application led May 28, 1898 T0 all whom, it may concern-f Be it known that I, LEVI LEROY ROWE, a citizen of the United States, residing at Bos-- ton, in the county of Suffolk and State of Massachusetts, have invented a new and useful ImprovementV in Bunsen Burners, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

My invention relates to an improvement in a Bunsen burner whereby the liability of gas lighting back to the air-inlet is prevented; and it consists in providingv the burner withan air-passage which opens upon the sideof the burner and takes a circuitous course about the burner to the gas-mixing chamberv or passage of the burner, whereby the gas may not be accidentally lighted below the burning-surface and above the inlet to the mixing-chamber by the accidental drawing in of the iame through the air-passage of the match or other device used for lighting the burner and whereby also the gas may not light back from its burning-surface to the gas-inlet and burn through the air-passage.

In the drawings, Figure lis a View in elevation of a burner especially adapted for lighting in connection with an incandescent mantle. Fig. 2 is a vertical section of said burner. Fig. 3 is a horizontal section upon the dotted line 3 3 of Fig. 2. Fig. 4 is a horizontal secti-on upon the dotted line 4 4 of Fig. 2. Fig. 5 is a View in plan, Fig. 6 in plan inverted, and Fig. 7 in vertical section upon the dotted line 7 7 of Fig. 5, of a multiple Bumsen burner with a single air-inlet especially adapt- Referring to the drawings, A represents the casing of a burner. Ithas agas-burning surface a, a gas-inlet ct', and a central passage az from the gas-inlet to the chamber a3 below the burning-surface. It also has an air-passage B, having its entrance at b in the side of the burner and extending about the wall a4, surrounding the central passage a2 to an opening b' into the passage a2, which is preferably placed near the gas-inlet 01,. It will be seen that the central passage d2 forms a mixing-chamber, in which the air and gas are commingled as they come from their re- Serial No. 682.001. (No model.)

speetive sources of supply. Said mixing chamber -or passage a2 is a substantiallyclosed chamber, the only opening being the air-inlet b', so that the column of gas rises from the gas-inlet aand passes through a direct practically-closed passage to the burner, and all danger ofthe escape of gas on its passage to the point of ignition is avoided. This opening b may be below the air-inlet b, as represented in Figs. l and 2, or it may be in line with it, or it may be slightly above it, the object being to establish for the air a passage relativelyV vso ci rcuitous as compared with the direct passage from the gas-inlet to the burning-surface as shall cause the gas to always follow the direct passage rather than the indirect air-passage.

In the, ordinary type of Bumsen burner air has been admitted directly into the mixingchamber over the gas-inlet, and as a result the gas was often ignited at the air-inlet by the accidental drawing in of the flame of a match or other device used for lighting the burner or by the lighting back of the gas from the burningsurface to the air-inlet, which sometimes occurs when the burningsurface has large aperturesin it and the pressure of the gas is low; but by making the connection between the outer air and the gasmixing chamber long and circuitous the liability of accidental lighting at the air-inlet is entirely done away with, as the iame of the match cannot be drawn through it to the gaschamber, and the lighting back of the gas to the air-inlet is prevented, as the gas will not takethe long course to the air-inlet.

I have represented the burner A as having inits lower end a chamber c, which contains, first, a piece c' in the nature of a cap, which -is contained in the lower end of the chamber, is fastened to the burner, closes the lower end of the passage a2, excepting that it provides the small gas-inlet a, and has an interior screw-thread c2.

Burner A rests upon the cap c' and maybe readily lifted therefrom, the only connection between the two parts being an inwardlyprojecting lug 022, which enters a vertical slot o23 in the side of5 the cap c', so that while the burner A has free vertical movement relative to the cap c and may be lifted therefrom if IOO the burner, is adapted to be turned upon the threaded holder c3, which has an exterior screw-thread, upon which the interior screwt-h read of the cap turns. This thread ed holder c3 also carries a conical valve C, which is centrally disposed Within it, with the small end of the cone in the conical gas-inlet df The lower part of the cone is surrounded by a chamber c4, which has the gas-feeding inlets c5. The holder c3 also has the interior screwthread c6 for the reception of the threaded end c7 of a gas-supply pipe cs. Itis intended to screw the holder c3 upon the gas-pipe. This will bring the cone at the end of the passage of the pipe and will connect the passage -of the gas-pipe by the inlet c5 with the chamber. The burnerA being turned will, through the lug-and-slot connection described above, rotate the cap c', and said cap screwing upon the holder will be moved toward and from the same, thereby causing the end of the cone which is stationary to close or open the gasinlet 01,', according as the holder is'turned, and the gas entering the-chamber c4 will pass about the cone through the inlet a/ into the passage 0,2. The How of gas through the inlet a may thus be varied by turning the burner Without the necessity of removing any of the parts or providing a separate gas-controlling device, while at the same time by merely lifting the burner proper from its support ready access may be had to the interior character specified and a single gas-inlet common to any desired number of independent burners or burning-surfaces.

It Will be observed that there is interposed between the opening of the air-passage into the direct passage from the gas-inlet to the burning-surfaces and its connection with the ou ter air a Wall or diaphragm dg, Which checks the flow through said passage and helps to establish a more regular and uniform flow of air and one not susceptible to variations from the infiuence of outside currents.

When the burner is used in conjunction with a mantle or a glass chimney, it is desirable that it have the burning-surface provided with a Hat metal ring R, (see Fig. 2,) applied to the gauze r and forming a circular exterior burning-surface and an interior or central opening, the purpose of this being to produce a circular exterior heating-flame which will hug the mantle in a cylindrical form and a central heating-flame which Will intensify and augment the heating effect of said exterior flame upon the mantel.

Having .thus fully described my invention, I claim and desire to secure by Letters Patent of the United Statesl. In a Bunsen burner, the combination with a burning-surface, of a gas-inlet, a direct air and gas passage leading from said inlet to said burning-surface and forming a substantially closed airand gas mixing chamber, a cham ber surrounding said mixing-chamber, an air-supply. passage leading to said direct air and gas passage through said'chamber in a circuitous course and terminating in a single opening in the Wall of said mixing-cham- IOO -invention as applied to a multiple burnerthat is, a burner having any desired number of burning-'surfaces a and having a single gas-inlet and a single air-inlet. d indicates the gas-inlet, the size of which is regulated by the means above specified or in any other desired Way. It opens into a passage d', which in turn opens into a Wide chamber d2 and from which extend the passages d3, each surmounted by aburning-surface. The burner also has in its base d4 the air-passage d5, which opens at d6, extends about the Wall (Z7, and opens into the passage d at d8. Air entering the passage d through the inlet .d8 is mixed with the gas in the passage d and in the chamber d2, and the various burners are supplied from thev chamber d2.

I prefer to make the burner in two sections or castings E E, which are united, preferably, by being screwed together at e. There is joined in this structure the means for encouraging the flow of gas to the burningpoints and the discouraging of its ow through the air-passage, With a single passage of the ber, and a Wall or diaphragm interposed between its outer inlet and the opening in the Wall of said mixing-chamber.

2. In a Bunrsen burner, the combination with a burning-surface, of a gas-inlet pipe, an airv and gas passage leading from said gas-inlet pipe to said burning-surface, a circuitous air-passage surrounding said air and gas passage and communicating therewith, a holder for the burner mounted on said inlet-pipe, said holder having passages c5 and provided with an integral conical valve C and a threaded encircling flange, and a cap threaded., on said iiange and adjustable thereon, said cap, forming,-With said flange, a chamber c4, said cap having also a conical opening in its top controlled by said conical valve C.

3. In a Bunsen burner, the combination with a plurality of independent burning-surfaces, of a common supply-chamber d2, separate passages connecting said commonchamber with the burning-surfaces,a substantially closed gas-passage d forming an air and gas mixing chamber leading to said chamber d2, and a circuitous air-passage d5 encircling said passage d', and entering said passage d through a single opening d8.

4. In a Bunsen burner, the combination with a section E having a chamber cl2 therein IIO and a plurality of burning-surfaces, a second section E screwed to said section E, a gas-inlet in said section E, a substantially closed direct passage leading from said inlet to said chamber d2, and forming an air and gas mixing chamber, and an air-supply passage d5 encircling said direct passage and entering said direct passage through a single opening at a point removed from the entrance to said airsupply passage.

5. A gasburner having a burning-surface consisting of a cap-plate R having a circular exterior Haine-opening and a central Hameaperture, whereby an exterior, circular heating-flame and a central heating-flame are produced.

6. A gas-burner having a burning-surface consisting of a gauze cap r, and a superposed cap-plate R having a circular, exterior ameopening and a central Ilaine-aperture,\vhereby an exterior, circular heating-flame and a central heating-dame are produced.

7. In a Bunsen burner, the combination with a gas-inlet pipe, of aholder c3 mounted on said' gaspipe and -provided With gaspassages c5, a conical valve C integral with said holder, a cap c adjustably mounted on said holder c3 and having an inlet-opening registering With said conical valve, a burner having an air-inlet mounted on said holder c3 and so connected with said adjustable cap c as that when said burner is turnedvthe cap is moved toward or from said conical valve C and the dow of gas through opening a is con trolled.

8. In a Bunsen burner, the combination with a gas-pipe, ot' a burner holder` or support thereon having suitable gas-passages and a conical gas-valve, of a cap screw-threaded to said holder and having an inlet-opening registering with said conical valve, and a burner mounted on said holder or support and free to slide vertically thereon, said burner being so connected with said cap as that rotation of said burner Will cause said cap to move toward and from said conical valve and regulate the flow of gas, said burner holding a suit-A able air-inlet.

9. In a Bunsen burner, the combination With the holder c3 screw-threaded to the gassupply pipe, and having passages c5, and the integral conical valve C, of the cap c pro'- vided with the inlet-opening a registering with said valve C and the vertical slot o23 in one side, and the burner A provided With an air-inlet b' mounted on said holder so as to have free vertical movement thereon, said burner having a lug C22 Which enters the slot o23 in said cap c', so that when said burner is moved toward or from the conical valve C the iiow of gas is regulated.

L. LEROY ROVVE.'

Witnesses:

F. F. RAYMOND, 2d, J. M. DOLAN. 

